Receiver adjustment between pilot bursts

• US 8,098,767 B2
• Filed: 12/20/2007
• Issued: 01/17/2012
• Est. Priority Date: 12/20/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Mirbagheri, Arash, Ma, Jun, Fan, Mingxi
• Primary Examiner(s): Payne, David C.
• Assistant Examiner(s): Dsouza, Adolf
• Application Number:
  US11/962,040
• Publication Number:
  US 20090161746A1
• Time in Patent Office: 1,489 Days
• Field of Search: 375/148, 375/260, 375/346, 455/458
• US Class Current: 375/316
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 2025/03796 Location of reference signals
• CPC Class Codes: H04L 25/0232 by interpolation between sounding signals
• CPC Class Codes: H04L 25/03019 adaptive, i.e. capable of adjustment during data reception
• CPC Class Codes: H04L 25/03114 non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals

Abstract

A receiver may train its equalizer using consecutive pilot bursts, divide the traffic between the consecutive pilot bursts into multiple sub-segments, and interpolate the trained equalizer coefficients to obtain the coefficients for equalizing one or more of the sub-segments. The receiver may also determine signal to interference and noise ratio (SINR) values based on each of the consecutive pilot bursts, and interpolate the SINR for decoding one or more of the sub-segments. The receiver may be an access terminal receiver operating in a code division multiple access (CDMA) cellular system.

Claims

1. A method for operating a receiver in a wireless communication system, the method comprising:

receiving a frame including a plurality of time slots, each time slot of the plurality of time slots comprising two half-slots, each half-slot comprising two traffic segments and a pilot burst between the two traffic segments, wherein the plurality of time slots comprises a first half-slot and a second half-slot following the first half-slot, the first half-slot comprising a first pilot burst and a first traffic segment following the first pilot burst, the second half-slot comprising a second traffic segment and a second pilot burst following the second traffic segment;

dividing the first and second traffic segments into a plurality of sub-segments, the plurality of sub-segments comprising a first sub-segment and a second sub-segment following the first sub-segment;

training an equalizer of the receiver on the first pilot burst to obtain a first plurality of trained tap coefficients;

training the equalizer of the receiver on the second pilot burst to obtain a second plurality of trained tap coefficients;

interpolating between the first and the second pluralities of trained tap coefficients to obtain a first set of interpolated tap coefficients for the first sub-segment;

measuring signal to interference and noise ratio of the first pilot burst to obtain a first measured SINR;

measuring signal to interference and noise ratio of the second pilot burst to obtain a second measured SINR;

interpolating between the first measured SINR and the second measured SINR to obtain a first interpolated SINR for the first sub-segment;

equalizing the first sub-segment by using the first set of interpolated tap coefficients;

scaling a result of equalizing the first sub-segment by the first interpolated SINR to obtain a first set of scaled data; and

decoding the first sub-segment using the first set of scaled data.

2. The method of claim 1, wherein decoding comprises:

calculating a first log likelihood ratio of the first set of scaled data; and

decoding the first sub-segment using the first log likelihood ratio.

3. The method of claim 2, wherein interpolating between the first measured SINR and the second measured SINR comprises interpolating in linear domain.

4. The method of claim 2, wherein dividing is performed so that the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, the method further comprising:

interpolating between the first measured SINR and the second measured SINR to obtain a second interpolated SINR for the second sub-segment;

interpolating between the first measured SINR and the second measured SINR to obtain a third interpolated SINR for the third sub-segment;

scaling output of the equalizer corresponding to the second sub-segment by the second interpolated SINR to obtain a second set of scaled data;

scaling output of the equalizer corresponding to the third sub-segment by the third interpolated SINR to obtain a third set of scaled data;

calculating a log likelihood ratio of the second set of scaled data; and

calculating a log likelihood ratio of the third set of scaled data.

5. The method of claim 2, wherein dividing is performed so that the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, the method further comprising:

scaling output of the equalizer corresponding to the second sub-segment by the second measured SINR to obtain a second set of scaled data;

scaling output of the equalizer corresponding to the third sub-segment by the first measured SINR to obtain a third set of scaled data;

calculating a log likelihood ratio of the second set of scaled data; and

calculating a log likelihood ratio of the third set of scaled data.

6. A method for operating a receiver in a wireless communication system, the method comprising steps of:

receiving a frame including a plurality of time slots, each time slot of the plurality of time slots comprising two half-slots, each half-slot comprising two traffic segments and a pilot burst between the two traffic segments, wherein the plurality of time slots comprises a first half-slot and a second half-slot following the first half-slot, the first half-slot comprising a first pilot burst and a first traffic segment following the first pilot burst, the second half-slot comprising a second traffic segment and a second pilot burst following the second traffic segment;

dividing the first and second traffic segments into a plurality of sub-segments, the plurality of sub-segments comprising a first sub-segment and a second sub-segment following the first sub-segment;

measuring signal to interference and noise ratio of the first pilot burst to obtain a first measured SINR;

measuring signal to interference and noise ratio of the second pilot burst to obtain a second measured SINR;

interpolating between the first measured SINR and the second measured SINR to obtain a first interpolated SINR for the first sub-segment; and

providing a data in the plurality of sub-segments to a user.

7. The method of claim 6, wherein the receiver comprises an equalizer, the method further comprising:

scaling output of the equalizer corresponding to the first sub-segment by the first interpolated SINR to obtain a first set of scaled data;

calculating a first log likelihood ratio of the first set of scaled data; and

decoding the first sub-segment using the first log likelihood ratio.

8. The method of claim 7, wherein interpolating between the first measured SINR and the second measured SINR comprises interpolating in linear domain.

9. The method of claim 7, wherein the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, the method further comprising:

interpolating between the first measured SINR and the second measured SINR to obtain a second interpolated SINR for the second sub-segment;

interpolating between the first measured SINR and the second measured SINR to obtain a third interpolated SINR for the third sub-segment;

scaling output of the equalizer corresponding to the second sub-segment by the second interpolated SINR to obtain a second set of scaled data;

scaling output of the equalizer corresponding to the third sub-segment by the third interpolated SINR to obtain a third set of scaled data;

calculating a log likelihood ratio of the second set of scaled data; and

calculating a log likelihood ratio of the third set of scaled data.

10. The method of claim 7, wherein the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, the method further comprising:

scaling output of the equalizer corresponding to the second sub-segment by the second measured SINR to obtain a second set of scaled data;

scaling output of the equalizer corresponding to the third sub-segment by the first measured SINR to obtain a third set of scaled data;

calculating a log likelihood ratio of the second set of scaled data; and

calculating a log likelihood ratio of the third set of scaled data.

11. A wireless terminal comprising:

a receiver;

a memory; and

a controller coupled to the receiver and the memory, the controller is configured to;

receive a plurality of time slots, each time slot of the plurality of time-slots comprising two half-slots, each half-slot comprising two traffic segments and a pilot burst between the two traffic segments, wherein the plurality of time slots comprises a first half-slot and a second half-slot following the first half-slot, the first half-slot comprising a first pilot burst and a first traffic segment following the first pilot burst, the second half-slot comprising a second traffic segment and a second pilot burst following the second traffic segment, wherein the first half-slot and the second half-slot are not separated by any other half-slot;

divide the first and the second traffic segments into a plurality of sub-segments, the plurality of sub-segments comprising a first sub-segment and a second sub-segment following the first sub-segment;

train an equalizer on the first pilot burst to obtain a first plurality of trained tap coefficients;

train the equalizer on the second pilot burst to obtain a second plurality of trained tap coefficients;

interpolate between the first and the second pluralities of trained tap coefficients to obtain a first set of interpolated tap coefficients for the first sub-segment;

equalize the first sub-segment by using the equalizer with the first set of interpolated tap coefficients;

measure signal to interference and noise ratio of the first pilot burst to obtain a first measured SINR;

measure signal to interference and noise ratio of the second pilot burst to obtain a second measured SINR;

interpolate between the first measured SINR and the second measured SINR to obtain a first interpolated SINR for the first sub-segment;

scale output of the equalizer corresponding to the first sub-segment by the first interpolated SINR to obtain a first set of scaled data; and

decode the first sub-segment based on the firs set of scaled data.

12. The wireless terminal of claim 11, wherein the controller is further configured to decode the first sub-segment by:

calculating a first log likelihood ratio of the first set of scaled data; and

decoding the first sub-segment using the first log likelihood ratio.

13. The wireless terminal of claim 12, wherein interpolating between the first measured SINR and the second measured SINR comprises interpolating in linear domain.

14. The wireless terminal of claim 12, wherein the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, and the controller is further configured to:

interpolate between the first measured SINR and the second measured SINR to obtain a second interpolated SINR for the second sub-segment;

interpolate between the first measured SINR and the second measured SINR to obtain a third interpolated SINR for the third sub-segment;

scale output of the equalizer corresponding to the second sub-segment by the second interpolated SINR to obtain a second set of scaled data;

scale output of the equalizer corresponding to the third sub-segment by the third interpolated SINR to obtain a third set of scaled data;

calculate a log likelihood ratio of the second set of scaled data; and

calculate a log likelihood ratio of the third set of scaled data.

15. The wireless terminal of claim 12, wherein the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, and the controller is further configured to:

scale output of the equalizer corresponding to the second sub-segment by the second measured SINR to obtain a second set of scaled data;

scale output of the equalizer corresponding to the third sub-segment by the first measured SINR to obtain a third set of scaled data;

calculate a log likelihood ratio of the second set of scaled data; and

calculate a log likelihood ratio of the third set of scaled data.

16. A wireless terminal comprising:

a receiver;

a memory; and

a controller coupled to the receiver and the memory, the controller configured to;

receive a plurality of time slots, each time slot of the plurality of time-slots comprising two half-slots, each half-slot comprising two traffic segments and a pilot burst between the two traffic segments, wherein the plurality of time slots comprises a first half-slot and a second half-slot following the first half-slot, no half-slot separating the first half-slot and the second half-slot, the first half-slot comprising a first pilot burst and a first traffic segment following the first pilot burst, the second half-slot comprising a second traffic segment and a second pilot burst following the second traffic segment;

divide the first and the second traffic segments into a plurality of sub-segments, the plurality of sub-segments comprising a first sub-segment and a second sub-segment following the first sub-segment;

measure signal to interference and noise ratio of the first pilot burst to obtain a first measured SINR;

measure signal to interference and noise ratio of the second pilot burst to obtain a second measured SINR;

interpolate between the first measured SINR and the second measured SINR to obtain a first interpolated SINR for the first sub-segment;

scale equalizer output corresponding to the first sub-segment by the first interpolated SINR to obtain a first set of scaled data; and

decode data in the plurality of sub-segments based on the first set of scaled data and provide the data to a user.

17. The wireless terminal of claim 16, wherein the controller is further configured to decode data by:

calculating a first log likelihood ratio of the first set of scaled data; and

decoding the first sub-segment using the first log likelihood ratio.

18. The wireless terminal of claim 17, wherein the controller is configured to interpolate between the first measured SINR and the second measured SINR by interpolating in linear domain.

19. The wireless terminal of claim 17, wherein the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, and the controller is further configured to:

interpolate between the first measured SINR and the second measured SINR to obtain a second interpolated SINR for the second sub-segment;

interpolate between the first measured SINR and the second measured SINR to obtain a third interpolated SINR for the third sub-segment;

scale equalizer output corresponding to the second sub-segment by the second interpolated SINR to obtain a second set of scaled data;

scale equalizer output corresponding to the third sub-segment by the third interpolated SINR to obtain a third set of scaled data;

calculate a log likelihood ratio of the second set of scaled data; and

calculate a log likelihood ratio of the third set of scaled data.

20. The wireless terminal of claim 17, wherein the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, and the controller is further configured to:

scale equalizer output corresponding to the second sub-segment by the second measured SINR to obtain a second set of scaled data;

scale equalizer output corresponding to the third sub-segment by the first measured SINR to obtain a third set of scaled data;

calculate a log likelihood ratio of the second set of scaled data; and

calculate a log likelihood ratio of the third set of scaled data.

21. A wireless terminal comprising:

means for receiving a wireless signal;

means for equalizing;

means for storing data; and

means for processing, the means for processing being coupled to the means for receiving, the means for equalizing, and the means for storing, wherein the means for processing is configured to;

receive a plurality of time slots, each time slot of the plurality of time-slots comprising two half-slots, each half-slot comprising two traffic segments and a pilot burst between the two traffic segments, wherein the plurality of time slots comprises a first half-slot and a second half-slot following the first half-slot, no half-slot separating the first half-slot and the second half-slot, the first half-slot comprising a first pilot burst and a first traffic segment following the first pilot burst, the second half-slot comprising a second traffic segment and a second pilot burst following the second traffic segment;

divide the first and the second traffic segments into a plurality of sub-segments, the plurality of sub-segments comprising a first sub-segment and a second sub-segment following the first sub-segment;

measure signal to interference and noise ratio of the first pilot burst to obtain a first measured SINR;

measure signal to interference and noise ratio of the second pilot burst to obtain a second measured SINR;

interpolate between the first measured SINR and the second measured SINR to obtain a first interpolated SINR for the first sub-segment; and

decode data in at least one of the sub-segments, based at least in part on the first interpolated SINR and provide the data to a user.

22. A The machine-readable medium comprising instructions that when executed by at least one processor of a wireless access terminal, cause the wireless access terminal to perform steps comprising:

receiving a plurality of time slots, each time slot of the plurality of time-slots comprising two half-slots, each half-slot comprising two traffic segments and a pilot burst between the two traffic segments, wherein the plurality of time slots comprises a first half-slot and a second half-slot following the first half-slot, the first half-slot comprising a first pilot burst and a first traffic segment following the first pilot burst, the second half-slot comprising a second traffic segment and a second pilot burst following the second traffic segment;

dividing the first and the second traffic segments into a plurality of sub-segments, the plurality of sub-segments comprising a first sub-segment and a second sub-segment following the first sub-segment;

training an equalizer on the first pilot burst to obtain a first plurality of trained tap coefficients;

training the equalizer on the second pilot burst to obtain a second plurality of trained tap coefficients;

interpolating between the first and the second pluralities of trained tap coefficients to obtain a first set of interpolated tap coefficients for the first sub-segment;

equalizing the first sub-segment by using the first set of interpolated tap coefficients

measuring signal to interference and noise ratio of the first pilot burst to obtain a first measured SINR;

measuring signal to interference and noise ratio of the second pilot burst to obtain a second measured SINR;

interpolating between the first measured SINR and the second measured SINR to obtain a first interpolated SINR for the first sub-segment;

scaling output of the equalizer corresponding to the first sub-segment by the first interpolated SINR to obtain a first set of scaled data; and

decoding the first sub-segment based on the first set of scaled data.

23. The machine-readable medium of claim 22, wherein decoding comprises:

calculating a first log likelihood ratio of the first set of scaled data; and

decoding the first sub-segment using the first log likelihood ratio.

24. The machine-readable medium of claim 23, wherein the step of interpolating between the first measured SINR and the second measured SINR comprises interpolating in linear domain.

25. The machine-readable medium of claim 23, wherein the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, and the steps further comprise:

interpolating between the first measured SINR and the second measured SINR to obtain a second interpolated SINR for the second sub-segment;

interpolating between the first measured SINR and the second measured SINR to obtain a third interpolated SINR for the third sub-segment;

scaling output of the equalizer corresponding to the second sub-segment by the second interpolated SINR to obtain a second set of scaled data;

scaling output of the equalizer corresponding to the third sub-segment by the third interpolated SINR to obtain a third set of scaled data;

calculating a log likelihood ratio of the second set of scaled data; and

calculating a log likelihood ratio of the third set of scaled data.

26. The machine-readable medium of claim 23, wherein the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, and the steps further comprise:

scaling output of the equalizer corresponding to the second sub-segment by the second measured SINR to obtain a second set of scaled data;

scaling output of the equalizer corresponding to the third sub-segment by the first measured SINR to obtain a third set of scaled data;

calculating a log likelihood ratio of the second set of scaled data; and

calculating a log likelihood ratio of the third set of scaled data.

27. A machine-readable medium comprising instructions, the instructions, when executed by at least one processor of a wireless access terminal, cause the wireless access terminal to perform steps comprising:

receiving a plurality of time slots, each time slot of the plurality of time-slots comprising two half-slots, each half-slot comprising two traffic segments and a pilot burst between the two traffic segments, wherein the plurality of time slots comprises a first half-slot and a second half-slot following the first half-slot, no half-slot separating the first half-slot and the second half-slot, the first half-slot comprising a first pilot burst and a first traffic segment following the first pilot burst, the second half-slot comprising a second traffic segment and a second pilot burst following the second traffic segment;

dividing the first and the second traffic segments into a plurality of sub-segments, the plurality of sub-segments comprising a first sub-segment and a second sub-segment following the first sub-segment;

measuring signal to interference and noise ratio of the first pilot burst to obtain a first measured SINR;

measuring signal to interference and noise ratio of the second pilot burst to obtain a second measured SINR;

interpolating between the first measured SINR and the second measured SINR to obtain a first interpolated SINR for the first sub-segment; and

decoding data in at least one of the sub-segments, based at least in part on the first interpolated SINR and providing the data to a user.

28. The machine-readable medium of claim 27, wherein decoding comprises:

scaling output of an equalizer corresponding to the first sub-segment by the first interpolated SINR to obtain a first set of scaled data;

calculating a first log likelihood ratio of the first set of scaled data; and

decoding the first sub-segment using the second log likelihood ratio.

29. The machine-readable medium of claim 28, wherein the step of interpolating between the first measured SINR and the second measured SINR comprises interpolating in linear domain.

30. The machine-readable medium of claim 28, wherein the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, and the steps further comprise:

interpolating between the first measured SINR and the second measured SINR to obtain a second interpolated SINR for the second sub-segment;

interpolating between the first measured SINR and the second measured SINR to obtain a third interpolated SINR for the third sub-segment;

scaling output of the equalizer corresponding to the second sub-segment by the second interpolated SINR to obtain a second set of scaled data;

scaling output of the equalizer corresponding to the third sub-segment by the third interpolated SINR to obtain a third set of scaled data;

calculating a log likelihood ratio of the second set of scaled data; and

calculating a log likelihood ratio of the third set of scaled data.

31. The machine-readable medium of claim 28, wherein the plurality of sub-segments further comprises a third sub-segment preceding the first sub-segment, and the steps further comprise:

scaling output of the equalizer corresponding to the second sub-segment by the second measured SINR to obtain a second set of scaled data;

scaling output of the equalizer corresponding to the third sub-segment by the first measured SINR to obtain a third set of scaled data;

calculating a log likelihood ratio of the second set of scaled data; and

calculating a log likelihood ratio of the third set of scaled data.

32. A method for operating a receiver in a wireless communication system, the method comprising:

receiving a frame including a plurality of time slots, each time slot of the plurality of time slots having a first pilot burst and a first traffic segment following the first pilot burst, and a second traffic segment and a second pilot burst following the second traffic segment;

dividing the first and second traffic segments into a plurality of sub-segments, the plurality of sub-segments comprising a first sub-segment and a second sub-segment following the first sub-segment;

training an equalizer of the receiver on the first pilot burst to obtain a first plurality of trained tap coefficients;

training the equalizer of the receiver on the second pilot burst to obtain a second plurality of trained tap coefficients; and

generating a first set of segment equalizing tap coefficients based on the first and the second pluralities of trained tap coefficients, wherein the generating includes

calculating a plurality of average coefficients, each average coefficient being an average of a corresponding one of the first trained tap coefficients and the second trained tap coefficients,

interpolating between each of the first trained tap coefficients and a corresponding one of the second trained tap coefficients to generate a plurality of interpolated coefficients,

weighting, based on a given averaging factor (Avg), a given interpolation factor (α

), and a chip distance (ChipDist) between the first pilot burst and the second pilot burst, each of the plurality of average coefficients differently from a corresponding interpolated coefficient to generate a set of weighted average coefficients and a corresponding set of weighted interpolated coefficients;

adding each weighted average coefficient and to a corresponding weighted interpolated coefficient to generate the first set of segment weighted equalizing tap coefficients; and

equalizing the first sub-segment by using the first set of weighted equalizing tap coefficients to generate an equalized first sub-segment output.

33. The method of claim 32, wherein the weighting of each average tap coefficient is performed according to the following formula:

34. The method of claim 32, wherein weighting each of the plurality of average coefficients comprises multiplying each average coefficient by Avg to generate the set of weighted average coefficients, and weighting the plurality of interpolated coefficients is based on a weight equal to 1−

Avg and on α

, and outputs the result as the set weighted interpolated coefficients.

35. The method of claim 34, wherein the weighting of each average tap coefficient is performed according to the following formula:

36. The method of claim 35, wherein the weighting of each interpolated tap coefficient, based on Avg and α

, is performed according to the following formula;

37. The method of claim 32, further comprising:

measuring signal to interference and noise ratio of the first pilot burst to obtain a first measured SINR;

measuring signal to interference and noise ratio of the second pilot burst to obtain a second measured SINR;

interpolating between the first measured SINR and the second measured SINR to obtain a first interpolated SINR for the first sub-segment; and

scaling the equalized first sub-segment output by the first interpolated SINR to obtain a first set of scaled data.

38. The method of claim 37, wherein decoding comprises:

calculating a first log likelihood ratio of the first set of scaled data; and

decoding the first sub-segment using the second log likelihood ratio.

39. A receiver for wireless communication comprising:

means for receiving a frame including a plurality of time slots, each time slot of the plurality of time slots having a first pilot burst and a first traffic segment following the first pilot burst, and a second traffic segment and a second pilot burst following the second traffic segment;

means for dividing the first and second traffic segments into a plurality of sub-segments, the plurality of sub-segments comprising a first sub-segment and a second sub-segment following the first sub-segment;

means for training an equalizer of the receiver on the first pilot burst to obtain a first plurality of trained tap coefficients;

means for training the equalizer of the receiver on the second pilot burst to obtain a second plurality of trained tap coefficients; and

means for generating a first set of segment equalizing tap coefficients based on the first and the second pluralities of trained tap coefficients, wherein the means for generating includes

means for calculating a plurality of average coefficients, each average coefficient being an average of a corresponding one of the first trained tap coefficients and the second trained tap coefficients,

means for interpolating between each of the first trained tap coefficients and a corresponding one of the second trained tap coefficients to generate a plurality of interpolated coefficients,

means for weighting, based on a given averaging factor (Avg), a given interpolation factor (α

), and a chip distance (ChipDist) between the first pilot burst and the second pilot burst, each of the plurality of average coefficients differently from a corresponding interpolated coefficient to generate a set of weighted average coefficients and a corresponding set of weighted interpolated coefficients;

means for adding each weighted average coefficient and to a corresponding weighted interpolated coefficient to generate the first set of segment weighted equalizing tap coefficients; and

means for equalizing the first sub-segment by using the first set of weighted equalizing tap coefficients and generating an equalized first sub-segment output.

40. The receiver of claim 39, further comprising:

means for measuring signal to interference and noise ratio of the first pilot burst to obtain a first measured SINR;

means for measuring signal to interference and noise ratio of the second pilot burst to obtain a second measured SINR;

means for interpolating between the first measured SINR and the second measured SINR to obtain a first interpolated SINR for the first sub-segment; and

means for scaling the equalized first sub-segment output, by the first interpolated SINR, to obtain a first set of scaled data.

41. The receiver of claim 39, further comprising means for decoding the first set of scaled data to obtain a first segment data output.

42. The receiver of claim 41 wherein decoding comprises:

calculating a first log likelihood ratio of the first set of scaled data; and

decoding the first sub-segment using the second log likelihood ratio.

43. A machine-readable medium comprising instructions that when executed by at least one processor of a wireless access terminal, cause the wireless access terminal to perform steps comprising:

receiving a frame including a plurality of time slots, each time slot of the plurality of time slots having a first pilot burst and a first traffic segment following the first pilot burst, and a second traffic segment and a second pilot burst following the second traffic segment;

dividing the first and second traffic segments into a plurality of sub-segments, the plurality of sub-segments comprising a first sub-segment and a second sub-segment following the first sub-segment;

training an equalizer of the receiver on the first pilot burst to obtain a first plurality of trained tap coefficients;

training the equalizer of the receiver on the second pilot burst to obtain a second plurality of trained tap coefficients; and

generating a first set of segment equalizing tap coefficients based on the first and the second pluralities of trained tap coefficients, wherein the generating includes

calculating a plurality of average coefficients, each average coefficient being an average of a corresponding one of the first trained tap coefficients and the second trained tap coefficients,

interpolating between each of the first trained tap coefficients and a corresponding one of the second trained tap coefficients to generate a plurality of interpolated coefficients,

weighting, based on a given averaging factor (Avg), a given interpolation factor (α

), and a chip distance (ChipDist) between the first pilot burst and the second pilot burst, each of the plurality of average coefficients differently from a corresponding interpolated coefficient to generate a set of weighted average coefficients and a corresponding set of weighted interpolated coefficients;

adding each weighted average coefficient and to a corresponding weighted interpolated coefficient to generate the first set of segment weighted equalizing tap coefficients; and

equalizing the first sub-segment by using the first set of weighted equalizing tap coefficients to generate an equalized first sub-segment output.

44. The machine-readable medium of claim 43, wherein weighting of each average tap coefficient is performed according to the following formula:

45. The machine-readable medium of claim 43, wherein weighting each of the plurality of average coefficients includes multiplying each average coefficient by Avg to generate the set of weighted average coefficients, and weighting the plurality of interpolated coefficients is based on a weight equal to 1−

Avg and on α

, and outputting the result as the set of weighted interpolated coefficients.

46. The machine-readable medium of claim 45, wherein weighting of each average tap coefficient is performed according to the following formula:

47. The machine-readable medium of claim 46, wherein the weighting of each interpolated tap coefficient, based on Avg and α

, is performed according to the following formula;